31454478601477 has 2 divisors, whose sum is σ = 31454478601478. Its totient is φ = 31454478601476.

The previous prime is 31454478601453. The next prime is 31454478601487. The reversal of 31454478601477 is 77410687445413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17141868795076 + 14312609806401 = 4140274^2 + 3783201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31454478601477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31454478601487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15727239300738 + 15727239300739.

It is an arithmetic number, because the mean of its divisors is an integer number (15727239300739).

Almost surely, 2^{31454478601477} is an apocalyptic number.

It is an amenable number.

31454478601477 is a deficient number, since it is larger than the sum of its proper divisors (1).

31454478601477 is an equidigital number, since it uses as much as digits as its factorization.

31454478601477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63221760, while the sum is 61.

The spelling of 31454478601477 in words is "thirty-one trillion, four hundred fifty-four billion, four hundred seventy-eight million, six hundred one thousand, four hundred seventy-seven".